5680649 has 4 divisors (see below), whose sum is σ = 6117636. Its totient is φ = 5243664.

The previous prime is 5680643. The next prime is 5680667. The reversal of 5680649 is 9460865.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2458624 + 3222025 = 1568^2 + 1795^2 .

It is a cyclic number.

It is not a de Polignac number, because 5680649 - 2⁸ = 5680393 is a prime.

It is a super-2 number, since 2×5680649² = 64539546122402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5680643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218474 + ... + 218499.

It is an arithmetic number, because the mean of its divisors is an integer number (1529409).

Almost surely, 2^5680649 is an apocalyptic number.

It is an amenable number.

5680649 is a deficient number, since it is larger than the sum of its proper divisors (436987).

5680649 is a wasteful number, since it uses less digits than its factorization.

5680649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436986.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 5680649 is about 2383.4112108489. The cubic root of 5680649 is about 178.4292233794.

The spelling of 5680649 in words is "five million, six hundred eighty thousand, six hundred forty-nine".